5. 48 dm3 of a gas has a mass of 262 grams. How many moles is this? What is the Mr? What must this element be?

How are oxygen and ozone alike

Describe the charges of the subatomic particles by choosing the answer from the drop-down menu. Proton have a charge. Have a 0 charge. Electrons have a charge.

Which of the following descriptions explains the process of water freezing?

Which of the following statements is true? Algae belong to the Plantae kingdom. Bacteria belong to the Protista kingdom. Organisms in the Monera kingdom are prokaryotes. A red rose and a pinkfose are variations of the same species.

Calculate the pH of a buffer that is 0.205M in NaHCO3 and 0.285M in Na2CO3.

Draw every stereoisomer for 1,2-difluoro-1,2-dimethylcyclopentane. use wedge-and-dash bonds for the substituent groups, and be sure that they are drawn on the outside of the ring, adjacent to each other.

Suppose an ice cube weighing 36.0 g at a temperature of 10°C is placed in 360 g water at a temperature of 20°C. Calculate the temperature after thermal equilibrium is reached, assuming no heat loss to the surroundings.

Why can't all the mixtures be classified as solutions? A. Not all mixtures are heterogeneous B. Not all mixtures are homogeneous C. Not all mixtures have solutes and solvents D. Mixtures are made of only one substance.

Which of the following is a homogeneous mixture? A) Molten ironB) Stainless steelC) Trail mixD) Water

State the general relationship between temperature of the water and the amount of the salt that will dissolve in the water